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    Clin Immunol. 2010 Feb;134(2):198-205. Epub 2009 Nov 13.

    Laboratory diagnosis of specific antibody deficiency to pneumococcal capsular polysaccharide antigens by multiplexed bead assay.

    Source

    Experimental Laboratory Medicine, Department of Medical Diagnostic Sciences, Biomedical Sciences Group, Catholic University Leuven, Leuven, Belgium.

    Abstract

    We evaluated a multiplexed bead-based assay (xMAP Pneumococcal Immunity assay from Luminex) for the simultaneous determination of antibodies against 14 capsular polysaccharides. Post-vaccination (Pneumovax) antibody concentrations were measured in 35 healthy children, 40 healthy adults, 99 consecutive patients with increased susceptibility to respiratory infection, and 24 patients with a deficient anti-polysaccharide antibody response. The serotype-specific lower 5th percentile (cutoff) value for the post-immunization antibody concentration was determined in healthy individuals. Eleven of 99 patients (11%) failed to mount a response that was >5th percentile of controls for at least 6 of the 14 serotypes tested, whereas only 3 of 75 controls (4%) failed to do so. All patients with known anti-polysaccharide antibody deficiency failed to mount a response that was >5th percentile of controls for at least 6 of the 14 serotypes tested. The XMAP pneumococcal immunity panel appears useful for identifying individuals with a low response to the unconjugated pneumococcal vaccine.

    Copyright 2009 Elsevier Inc. All rights reserved.

    PMID:
    19914139
    [PubMed - indexed for MEDLINE]

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